Section 3, Question 15 of the June 2007 LSAT presents this stinker of an argument:
A consumer magazine surveyed people who had sought a psychologist’s help with a personal problem. Of those responding who had received treatment for 6 months or less, 20 percent claimed that treatment “made things a lot better.” Of those responding who had received longer treatment, 36 percent claimed that treatment “made things a lot better.” Therefore, psychological treatment lasting more than 6 months is more effective than shorter-term treatment.
Ideally, you’ll be able to poke holes in this one before proceeding to the answer choices. This isn’t the only way to do the test, but it’s the best one. Can you tell me why the above argument is bullshit?